<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
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  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>

  
  <script>
   function getOddAverage(arr) {
    let sum = 0 
    let count = 0
     for(let i = 0; i<arr.length; i++){
       if (arr[i]%2!==0) {
        sum+=arr[i] 
        count++
       }
         
     }
    
      return  sum/count || 0
     
   }
   let arr = [2,4,6,8,13,23]
   console.log(getOddAverage(arr));
  </script>
</body>
</html>